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Cleaning Used Throttle Body

I purchased a pair of used throttle bodies.
My plan is to clean them up, send the injectors out for professional cleaning and eventually swap them onto my R1100RT (currently 100k miles). So, I don't have a parts washer or ultrasonic cleaner. I've got an aluminum roasting pan, simple green and any other bottle of cleaner chemical available at the local auto parts places. What's my best choice to get these cleaned up. They are fairly grungy both inside and outside.

I purchased a pair of used throttle bodies.
My plan is to clean them up, send the injectors out for professional cleaning and eventually swap them onto my R1100RT (currently 100k miles). So, I don't have a parts washer or ultrasonic cleaner. I've got an aluminum roasting pan, simple green and any other bottle of cleaner chemical available at the local auto parts places. What's my best choice to get these cleaned up. They are fairly grungy both inside and outside.

Several different methods. My favorite is 1 part vinegar/2 parts water and soak for 24-48 hours.
You can also heat it on the stove and cook the parts for 1-2 hours.
I'd try on a small piece first to test for discoloration.

It's jsut a mild acid.....

Ken

IBA #44567 Pres. Springfield BMW Roadriders
"Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
-Albert Eienstein

I recently learned about a 50/50 mix of Dawn dish wash liquid and white vinegar as a degreaser. The vinegar needs heating to coffee temperature prior to mixing so it combines better with the soap. Biodegradable is a plus.
Works very well. Spray on, scrub with stiff brush and rinse with water.
Cheap, too.

Clean Throttle Bodies

Done.
I soaked the throttle bodies in a mixture of Pine-Sol and water in a 1:1 ratio. The water was hot when I started this. Soaked the right side TB for about six hours. I used a soft toothbrush on a few tough spots but that might not be necessary. Then I removed it and rinsed, first with warm sudsy water, then just hot water. With the hot water I was able to remove the rubber manifold between the TB and the cylinder which was stuck on before.

Then I placed the left side TB into the Pine-Sol solution after adding a bit more of hot 1:1 mix. The TPS was removed before the left TB went into the bucket. Soaked it for six hours too. The mix was pretty dirty after the first TB and this may have reduced the effectiveness as the left TB did not clean up quite as well as the right TB. The insides cleaned real well on both, just the outside of the left TB was not as clean.

Carb Cleaner

Just went thru this exercise on mine this morning using a commercial carb cleaner. Used a tooth brush and fine steel wool and the results weren't near as impressive as these. Since they are still off the bike, I'm going to soak them and see how they do. I'm curious, the right throttle body has substantially more black buildup than the left. Mine looked just like that also. I was concerned that there might be a problem in the balance. Any thoughts?